Windows 7 has surged to the top of's software chart, just hours after the new operating system became available for pre-order on the online retailer's site.

Amazon said more copies of Windows 7 have been pre-ordered in its first eight hours on the site than Windows Vista achieved in its entire 17-week pre-order period.

At 10am, Windows 7 Home Premium E held the number one spot in Amazon's software chart, while Windows 7 Professional E was at number two. The two versions were the only software packages to have been in Amazon's chart for less than 100 days.

Preorder Windows 7

"Both Windows 7 upgrade packages shot to the top of the software bestsellers chart over in the US as soon as they were made available for pre-order at the end of June," said Chris Poad, Director of Software at "With the significant discount currently on offer, a similar level of high demand was expected in the UK for what is undoubtedly the biggest software release for many years."

Windows 7 was made available at midnight last night on a first-come first-served basis.

From selected UK Windows 7 retailers, users can purchase licences for just £49.99 for Home Premium, and £99.99 for Windows 7 Professional. This represents a large saving on the SRP for Windows 7: according to Microsoft, Windows 7 Home Premium Edition should cost £149, while the Professional version will be £219 and the Ultimate Edition £229.

See also:

Windows 7 review

Microsoft: no Windows 7 RTM yet